Table 1 Scores assessing the extent and severity of CT abnormalities

0

1

2

3

Liquid pleural effusion

absent

mild

moderate

high

Pneumothorax

absent

mild

moderate

high

Bronchiectasis (per lobe)

absent

cylinder

varicose

cystic

Bronchial anastomotic stenosis

< 50%

50% to 65%

> 65%

Bronchial anastomotic dehiscence

absent

moderate < 1 cm

severe > 1 cm

Bronchial wall thickening

absent

mild

severe

Anastomotic granuloma

yes

no

Mosaic attenuation

yes

no

Pulmonary embolism

absent

>4^th order

segmental

lobar

Arterial anastomotic stenosis

absent

< 50%

> 50%

GGO

absent

< 10 lobules

1 to 3 segments

4 to 6 segments

diffuse

Consolidations

absent

< 10 lobules

1 to 3 segments

4 to 6 segments

diffuse

retractile consolidations

absent

< 10 lobules

1 to 3 segments

4 to 6 segments

diffuse

Interstitial opacities

absent

< 10 lobules

1 to 3 segments

4 to 6 segments

diffuse

Air trapping (per lobe)

< 25%

25% to 50%

50% to 75%

> 75%

Tree in bud nodules

GGO alveolar nodules

Proximal bronchiectasis

Distal bronchiectasis

Bronchial wall thickening

Mucous plugs